论文标题
银河旋转曲线的暗物质流体约束
Dark matter fluid constraints from galaxy rotation curves
论文作者
论文摘要
星系旋转曲线被认为是暗物质或某些动态等效机制的令人信服的证据。仅从旋转曲线数据开始，我们提出了一种独立的模型方法，即一般假设，即暗物质具有正压流体的特性。它显示了如何以旋转曲线数据及其径向衍生物来表示声音平方的速度，以及如何从限制在0到$ C^2 $之间的要求中获得模型独立的约束。使用文献中可用的银河系旋转曲线数据，我们获得了对声音速度的限制，并说明了这种方法的潜力。讨论了拟议方法的技术挑战，局限性以及可能的未来扩展和改进。
Galaxy rotation curves are considered to be convincing evidence for dark matter or some dynamically equivalent alternative mechanism. Starting only from the rotation curve data, we present a model independent approach of testing a general hypothesis that dark matter has the properties of a barotropic fluid. It is shown how the speed of sound squared can be expressed in terms of rotation curve data and their radial derivatives and how model independent constraints can be obtained from the requirements that it is confined between 0 and $c^2$. Using the Milky Way rotation curve data available in the literature, we obtain the constraints on the barotropic fluid speed of sound and illustrate the potential of this approach. Technical challenges, limitations and possible future extensions and improvements of the proposed approach are discussed.
